Slides from Sydney GDG 2015 AOSP Workshop (7-November-2015)

1. Nanik
Tolaram
nanikjava@yahoo.com
AOSP WorkshopAOSP Workshop
Sydney
Devfest
7th
November
2015

2. • Senior Android Platform Engineer-Senior Android Platform Engineer-
BlocksGlobal.comBlocksGlobal.com
• ScreenerOS – http://screener.digitalScreenerOS – http://screener.digital
• Lumen Health –Lumen Health – http://lumenhealth.cohttp://lumenhealth.co (pilot)(pilot)
• Android writer for magazine.odroid.comAndroid writer for magazine.odroid.com
• AOSP Contributor (when time permits)AOSP Contributor (when time permits)
About MeAbout Me

3. • Android Open Source ProjectAndroid Open Source Project
• Powers BILLIONS of Android devices !Powers BILLIONS of Android devices !
• Who uses it ? What does it contains ? Why youWho uses it ? What does it contains ? Why you
want to know ?want to know ?
• Future OpportunityFuture Opportunity
• Source – android.googlesource.comSource – android.googlesource.com
AOSPAOSP

4. AndroidAndroid
StackStack

5. LinuxLinux
KernelKernel• Most are pre-4.x kernelMost are pre-4.x kernel
• ““Android”-ify KernelAndroid”-ify Kernel
• Few vendors provide updated kernelFew vendors provide updated kernel
• Maintained by open source communityMaintained by open source community

6. Framework +Framework +
LibraryLibrary• Between application and kernelBetween application and kernel
• Android SDK lives hereAndroid SDK lives here
• C,C++ and Java universeC,C++ and Java universe
• Frequent update (security and bug fixes)Frequent update (security and bug fixes)
• Dalvik/ART is hereDalvik/ART is here

7. ApplicatioApplicatio
nsns• Standard bundled appsStandard bundled apps
• Production readyProduction ready
• Extend to create your own appExtend to create your own app
• Not IDE friendlyNot IDE friendly

8. VendorVendor
DriverDriver• Binary filesBinary files
• Heavily reliance on hardware vendorHeavily reliance on hardware vendor
• No update == No future Android supportNo update == No future Android support
• Android specific driversAndroid specific drivers

9. • Intel i5 or i7Intel i5 or i7
• 16GB RAM (minimum)16GB RAM (minimum)
• SSD drive (highly recommended)SSD drive (highly recommended)
• Min 50GB free spaceMin 50GB free space
• 64-bit Linux OS (highly recommended)64-bit Linux OS (highly recommended)
BuildBuild
SystemSystem

10. HowHow
Big ?Big ?
(*) size not includes .repo/, out/, .git/ directories(*) size not includes .repo/, out/, .git/ directories
(+) size does not include out/, prebuilts/, device/, development/, docs/, ndk/, pdk/, vendor/, tools/, developers/,(+) size does not include out/, prebuilts/, device/, development/, docs/, ndk/, pdk/, vendor/, tools/, developers/,
sdk/, hardware/, dalvik/, .repo/, .git/, kernel/sdk/, hardware/, dalvik/, .repo/, .git/, kernel/

11. NexusNexus
DevicesDevices• Straight build from AOSPStraight build from AOSP
• Extra driver downloadExtra driver download
• Maintained by GoogleMaintained by Google
• Custom Android from communityCustom Android from community
• Always up-to-dateAlways up-to-date

12. PartitionPartition
ss• Android deviceAndroid device ISIS a “computer”a “computer”
• Partitions - /system, /data, /cache, /recoveryPartitions - /system, /data, /cache, /recovery
• Flashing = Writing to partitionFlashing = Writing to partition
• Fastboot – gateway to flashing (maintained byFastboot – gateway to flashing (maintained by
vendor)vendor)

13. BootloadeBootloade
rr• Majority are custom u-bootMajority are custom u-boot
• Factory locked (need to unlock)Factory locked (need to unlock)
• Security first line of defenceSecurity first line of defence
• Updated along with radio (GSM)Updated along with radio (GSM)

14. ImagesImages
• system.img → /system partition (core Androidsystem.img → /system partition (core Android
framework)framework)
• boot.img → init/ramdisk + kernelboot.img → init/ramdisk + kernel
• recovery.img → /recovery partitionrecovery.img → /recovery partition
• userdata.img → /data partitionuserdata.img → /data partition
• cache.img → /cache partitioncache.img → /cache partition

15. WorkshoWorksho
pp• Setup machine / VMSetup machine / VM
• Checkout code (android-6.0.0_r1)Checkout code (android-6.0.0_r1)

Hardware Drivers -Hardware Drivers -
developers.google.com/android/nexus/driversdevelopers.google.com/android/nexus/drivers

Build (1-2 hours)Build (1-2 hours)

Flash to your deviceFlash to your device

16. SourceSource
DivingDiving
android-6.0.0_r26